Instruction Manual
1030 | 1031 LARGE AIR COMPRESSOR
06
1.  Plug the power cord to the appropriate power supply.
Within  the  rst  10  seconds,  the  software  version  will  display  “1.23,” 
followed by the air tank pressure, sequentially.
Example: 85 psig will display as 8-5 [pause]
2.  Slowly purge the air tank until both motors power ON, 
then close the shut-off valve.
3.  Allow the air tank to ll (approximately 2–5 minutes).
4.  Check for display to reach between 118–120 psig (8.14–
8.27 bar). 
TEST PASS:
•  The software will automatically power OFF the motors when 
the display reads between 118–120 psig (8.14–8.27 bar). 
•  No air leaks detected. 
TEST FAIL:
•  Motors do not power OFF when the display reads between 
118–120 psig (8.14–8.27 bar). 
•  An air leak detected.
•  An error buzz sound and error code displays (
“E-r-#”
).
If the test fails, make note of the error code (if present) 
and disconnect the power cord from the power supply to 
power OFF. Refer to the troubleshooting section (page 8) 
for possible corrective action and perform the Test Run 
procedure again. If failure persists, contact your Keiser 
dealer, distributor, or Keiser Customer Support (see front 
cover for contact information).
Air compressor maintenance shall only be performed by 
Keiser-certied technicians.
1.  Plumbing: Attach the 1/2-inch air line to the male connector 
at the shut-off valve with a 1/2-inch compression nut 
(Tools: Adjustable Wrench or 13/16-inch Wrench). Reduce 
to a 3/8-inch air line using a 1/2x3/8-inch Union Reducer 
(Tools: Adjustable Wrench and 5/8-inch Wrench).
2.  Power Cord: Ensure shut-off valve is in the SHUT (OFF) 
position. Connect the power cord to the power connector 
on the circuit board housing. 
3.  Proceed to the Test Run section.
ASSEMBLY
ELECTRIC SHOCK HAZARD
•  Install this product where it will not come into contact with 
water or other liquids.
•  Ensure the power cord is free of damage before connecting 
to the power supply. 
•  If the power cord is damaged, or shows signs of excessive 
wear, stop use of the equipment immediately. Do not use 
the equipment until the power cord is replaced. Only use 
power cords provided by Keiser Corporation.
•  This product must be properly grounded. For 120-volt or 
220/240-volt circuits, connect power supply cord grounding 
plug to a matching grounded outlet. Do not use an adapter 
(See diagram below).
•  The plug must be plugged into an outlet that is properly 
installed and grounded in accordance with all local codes 
and ordinances.
•  Do not modify the power cord provided. Check with a qualied 
electrician or serviceperson if grounding instructions are 
not completely understood.
•  Failure to follow these instructions can result in death, re 
or electrical shock.
Grounded 
Plug
120-volt grounded connectors shown. 
220/240-volt grounded connectors will differ in shape.
Grounding 
Pin
Grounded
Outlet
Neutral Hot
DANGER
ELECTRICAL POWER REQUIREMENTS
Before using the air compressor, check that supply voltage 
agrees with that listed on product serial number label or 
refer  to  the Equipment  Specications section  (page  4).  
Low voltage or an overload circuit can cause the overload 
protection system circuit breaker to trip.
WARNING
EXPLOSION HAZARD
•  Exercise caution when using pressurized air.
•  Wear safety glasses.
•  Only use hoses and air ttings provided by the manufacturer.
•  Inspect all hoses and ttings for leaks or wear. If leaks or 
wear are detected, stop use and replace parts immediately. 
Do not use until repairs have been completed and tested 
by a Keiser-certied technician.
•  Never leave pressurized air in the air tank when storing the air 
compressor or during scheduled downtime (maintenance).
•  If the air tank develops a leak, replace the air tank 
immediately. Never repair, weld or make modications to 
the air tank or its attachments.
•  Never make adjustments to the factory-set pressures.
TEST RUN










